Sectional electric conduit.



No. 767,463. PATENTED AUG. 16, 1904.

. G. E. WILSON.

SBQTIONAL ELECTRIC CONDUIT.

APPLICATION FILED DEO.14, 1901.

N0 MODEL.

FIGZ'J.

' INVENTOR: 404 2 50m W|TNESSE Patented August 16, 1904.

PATENT @EETEE.

CHARLES E. IVILSON, OF PHILADELPHIA, PENNSYLVANIA.

SECTIONAL ELECTRIC CONDUIT.

SPECIFICATION forming part of Letters Patent No. 767,463, dat August 16', 1904. Application filed December 14, 1901. S al No- 85,907. (No model.

To (all 11/72/0771, it may concern.-

Be it known that I, CHARLES E. VVILSON, a citizen of the United States, residing at N o. 1010 South Forty-sixth street,.in the city and county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Sectional Conduits, of which the following is a specification, reference besides and building up a composite conduit by placing such composite sections in juxtaposi tion with interposition of alinement-pins, so laid as to rest each half in the groove of one section and half in the groove of the adjoining section. In this way accurate side alinement of the conduit-section is secured. If a composite conduit thus built up be laid in a trench with concrete at the bottom and sides of the trench, the side alineinent secured by the interposed alinement-pins will sulfice to hold the whole composite conduit in position until the setting of the concrete solidifies the whole composite structure.

In the accompanying drawings, Figure 1 is a perspective view of a conduit-section embodying my invention. Fig. 2 is a sectional longitudinal view of two courses of a conduit made of these sections, showing the method of superposing them and maintaining their alinement. Fig. 3 is an end elevation of one of the conduit-sections of Fig. 1. Fig. 4 is a View of one of the alinement-pins.

The conduitsection shown in Fig. 1 is formed of baked clay. It is approximately square in cross section, with the corners rounded. It is divided by longitudinal median partitions a a a a into four independent ducts, each of about one-quarter of the capacity of the entire conduit-section and all similar in shape. Opposite the points Where the partition-lines a a a a meet the outer walls of the conduit-section are formed the four semicircular grooves b b 7) 6, running from end to end along the median line of each of the four sides of the conduit-section. It will thus be observed that the section is similar no matter which side is used as the base.

In order to form a composite electrical conduit, the conduit-sections are laid in courses alongside of and on top of each other to Whatever extent may be desired until the required capacity is reached. In doing this the alinement of the conduit-sections is maintained by laying them so that the joints of adjacent courses are in a staggered or alternating relation to each other after the manner of bricklaying, and by inserting at convenient intervals along the grooves b 7) liners, which may consist of the small cylindrical alinement-pins 0, made of Wood or other material, and which may be placed in the grooves to whatever extent is necessary to keep the courses, whether in vertical or horizontal relation to each other, from shifting their position. These alinement-pins are of such size as to rest easily in the semicircular grooves at any point Where they may be placed and of such diameter that each one engages simultaneously the sides of the two conduit-sections between which it is placed.- It is possible when rapidly laying the conduit-sections to insert the alinementpins promiscuously without special regard to their position, thus much facilitating the laying of the conduit.

Having thus described my invention, I claim 1. A composite conduit formed by the juxtaposition of conduit sections of substantially square cross-section, having longitudinal grooves coincident with the median lines of each of the four sides; with alinement-pins interposed at promiscuous intervals along the length of the grooves; each of said alinementpins engaging simultaneously the sides of the two conduit sections between Which it is placed.

2. 'A composite conduit formed by laying alongside of and on top of each other, with staggered joints, a series of conduit-sections of sabstantially square cross-sections, each subdivided by longitudinal median partitions into four duets, with longitudinal grooves formed along the sides opposite the points of union of the median partitions with the sides; with alinement-pins interposed at promiscuous intervals along the length of the grooves; each such alinement-pin occupying the space formed by the grooves of two adjacent conduit-sections, and thus engaging simutaneously the sides of both conduit-sections between which it is placed.

A composite conduit formed by the juxtaposition of conduit sections of substantially square cross-section, having longitudinal semicircular grooves coincident with the median lines o'l each of the four sides; with cylindrical alinement-pins interposed at intervals along the length of the grooves. each of said alinement-pinsengaging simultaneously the sides of the two conduit-sections between which it is placed.

4. A con duit-section, of substantially square cross-section, having a semicircular longitudinal groove formed upon the median line of each side in combination with cylindrical pins laid in the grooves, substantially as described.

5. A composite conduit, composed of courses of conduit-sections, each of said conduit-sections being of substantially square cross-section, and having a longitudinal median groove on each side, with cylindrical alinement-pins laid in grooves between adjacent conduit-sections, substantially as described.

6. A composite eond uit, composed of courses of conduit-sections with the breaks of adjacent sections in staggeredrelation to each other,

each of said conduit-sections being of substantially square cross-section, and having a longitudinal median groove on each side, with cylindrical alinement-pins laid in the grooves between adjacent conduit-sections, substantially as described.

CHARLES E. WVILSON.

\Vitnesses:

JAMEs H. BELL, E. Reuse. 

